摘要
采用共沉淀法合成氧化石墨烯负载四氧化三铁(Fe_(3)O_(4)/GO)纳米材料,将其作为非均相催化剂引入光芬顿反应用于奶制品的消解。结合X射线粉末衍射、扫描电镜、红外光谱以及热重分析对Fe_(3)O_(4)/GO的结构和形貌进行表征;考察光芬顿反应体系的pH值、反应时间和催化剂使用量对牛奶样品消解效果的影响;并用氢化物发生原子荧光光谱法测定牛奶样品消解液中的砷含量。该综合实验涉及纳米复合材料的制备和结构表征、光芬顿催化性能研究及其实际应用等多方面内容,可以使学生得到较系统的科学研究训练,有利于提高学生综合运用知识的能力,并开发学生科研探索的潜力。
Graphene oxide supported ferric oxide(Fe_(3)O_(4)/GO)nanomaterials,which was prepared by coprecipitation method,was employed as a heterogeneous catalyst for photo-Fenton reaction for the digestion of dairy products.The structure and morphology of Fe_(3)O_(4)/GO were respectively characterized by X-ray powder diffraction,scanning electron microscopy,FT-IR spectrometry and thermogravimetric analysis.The effects of pH value,reaction time and catalyst dosage on the digestion of milk samples were investigated.After digestion,the content of arsenic in milk samples was determined by hydride generation atomic fluorescence spectrometry.The proposed comprehensive experiment is simple in operation,while involving the preparation and characterization of nanocomposites,the investigation of catalytic properties of photo-Fenton reaction,as well as its practical application.It can enable students to conduct more systematic scientific research training,help them to utilize comprehensive knowledge,and stimulate their potential for scientific research.
作者
邓冬艳
刘湘成
宋红杰
DENG Dongyan;LIU Xiangcheng;SONG Hongjie(College of Chemistry,Sichuan University,Chengdu 610064,China)
出处
《实验室研究与探索》
CAS
北大核心
2021年第7期229-231,236,共4页
Research and Exploration In Laboratory
基金
四川大学新世纪教育教学改革工程研究项目(SCU8157)。
关键词
光芬顿反应
非均相催化
奶制品的消解
实验设计
photo-Fenton reaction
heterogeneous catalysis
digestion of diary
experimental design
